This website contains basic information about Galaxy Clusters and their properties. Includes a brief explanation on how to apply the Virial Theorem to calculate a Cluster's Mass, and how the Theory of Dark Matter derives...

This site offers a variety of Java applets which explore the motion of planets, stars, and galaxies. Each applet comes with background information on the pertinent astrophysics, a technical description of what's being...

This site is a collection of lecture notes for a course called the universe of galaxies. These notes discuss the integrated properties, classification, stellar and gaseous content of galxies; galaxies within, gasesous...

This website provides an interactive java applet which allows the user to model galaxy collisions. With this applet the user can study how galaxies collide and merge gravitationally and how the effects of the collision...

This webpage has descriptions and animations from numerical simulations of colliding galaxies. Normal observation shows interacting galaxies apparently frozen in the midst of billion-year-long collisions. These movies...